Nekuroshi, Who Died Twice

Vigilance, lifelink, menace.
Instant cards in your hand are Arcane in addition
to their other types and have splice onto arcane.
Its splice onto arcane cost is equal to its mana cost reduced by {1}.
When Nekuroshi dies, if it had no counters on it, return it to the battlefield with a finality counter on
it. It gets +2/+0 and "{w}{u}{b}: Until end of turn,
you may play target Spirit or Arcane card from
your graveyard."